title: Determination of alkyltrimethylammonium surfactants in hair conditioners and fabric softeners by gas chromatography-mass spectrometry with electron-impact and chemical ionization.
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006203:Hair Preparations / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013501:Surface-Active Agents / Q000032:analysis*
chemical_list: D006203:Hair Preparations; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents